Work holder for brush machines



--"A r"il 3, 1928.

c. JOBST WORK HOLDER FOR BRUSH MACHINES 6 Sheets-Sheet 1 Filed Jan. 7, 1922 Q mm N O. C

April 3, 1928.

C. JO'BST WORK HOLDER 'FOR BRUSHMACHINES Filed Jan. '7, 1 22 '6 Sheets-Sheet 2 uuvwtm Cowman. Jessi Gu s Liv-l I I l l l I.

C. JOBST worm HOLDER FOR BRUSH MACHINES Filed Jan. '7, 1922 6 Sheets-Sheet 5 3140mm Cleuam. Q0551.

April 3, 1928. 1,664,422

c. .JOBST WORK HOLDER FOR BRUSH MACHINES Filed Ja.n '7. 1922 6Sheets-Sheet 4 April 3, 1928.

- C. JOBST WORK HOLDER FOR BRUSH mcnmns Filed Jan. '7, 1922 6 Sheets-Sheet 5 C. JOBST WORK HOLDER FOR BRUSHMACHINES April 3, 1928.

Filed Jan. 7. 1922 Sheets-Sheet 6 Fae.

Sumo; Comma does-r Patented Apr. 3, 1928.

UNITED STATES PATENT ounce.

CONRAD 301551, 013 TOLEDO, OHIO,

AUTOMATIC BRUSH MACHINE OHIO.

ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE TOLEDO COMPANY, OF TOLEDO, OHIO, A CORPORATION- 01 i WORK HOLDER FOR BRUSH MACHINES.

Application filed January 7, 1922. Serial No. 527,591.

to render this mechanism more positive and accurate in its operation; third, to provide for adjustment affecting the amplitude 0 movements in each Work holder to compensate for variations in the work performed on the respective holders; fourth, to obtain various advantages as hereinafter set forth. 7 Certain features of the brush machine described in the specification and illustrated in the drawings but not claimed herein form the subject matter of my co-pending applications, Serial No. 438,391, filed January 19, 1921, entitled Brush making machine; Serial No. 527,590, filed January 7, 1922, entitled Brush machine; and Serial No. 527,589, filed January 7 1922, entitled Tuft forming mechanism.

In the drawings: 1 Figure I is a horizontal section through a rush machine showing a pair of work holders in conjunction with the back boring and tuft setting mechanisms; 7 I a Figure 2 is a sectional front elevation of the pair of holders; j Figure 3 is a side elevation thereof; Figure 4 is a horizontal section Figure 5 is a vertical section through the as guide for the slides on line 5-5 of Figure 2; Figure 6 is a horizontal section through the slides and guide-way on line 6-6 of Fig. 2;

Figure 7 is a similar horizontal section on line '77 of Fig. 2. p

Figure 8 is a sectional perspective view of one of the brush holders.

In the manufacture of brushes on certain types of automatic brush machines, the 4.5 brush backs are successively engaged with work holders, in one of which the backs are bored to receive the tufts while in another the tufts are set. These holders must be simultaneously and correspondingly 59 adjusted through a series of positions corresponding to the differentlocationsof the tufts is the hrush hack and the movements.

respective mechanisms.

in the two holders must exactly correspond in order to secure exact registration. Also, it is customary to arrange the tufts at dif= fer'ent angles, which necessitates an angular adjustment of each work holder. further, it is necessary that each portion of the brushback which is registered with the drill or tuft setting mechanism should be in the same'plane in order that the depth f of holes drilled and the setting of the tuft should be uniform. I

Heretofore machines have been devised for accomplishing all of the functions above described, but such mechanisms have been complicated and also have not been accurate in operation. One serious defect is occa= sioned by the angular position of the brush back during the drilling operation. This Still will cause a slight deflection of the drill when entering the back, with theresult that the holes drilled will not exactly register with the tuft setting mechanism. In my improved machine I have provided a simple adjustment means to compensate for this deflection and to render the registration absolutely exact. I have also simplified the construction in various other ways as will be hereinafter set forth,

As shownin Fig. 1, A is a drilling mechanism and B a tuft settingmechanis'm of a brush .machine, while C and D are work holders for registering the work with the Each of these work holders comprises a bifurcated head which has a hollow vertically extending sleeve shank F journaled in bearings G in the stationary frame H. The furcationsof the head form cheek plates I between which is arranged an oscillatory frame J having its pivot K projecting into horizontal grooves L in said cheek plates and engaging slidable bearing blocks L therein. L are springs pressing against plungers'L which in turn engage the bearing blocks L and yieldably force the same in a rearward direction. These springs are located in bores from the front of the cheek plates, which bores are closed by plugs L forming abutments for the springs. v v

The frame J is formed of side plates preferably integral with a front plate J which recessed to receive the clamping jaws J 3 for holding the brush back. A face plate J is secured to the front plate J by suitable means such as screws J 9 and forms a support for the brush back. The jaws J project outward through slots in the face plate J 2 and are actuated by suitable mechanism, not shown in detail, operable from a rotary shank J the arrangement being such that by rotating this shank J*, the brush 1 back may be quickly clamped or released and will always be held in a predetermined position. The member J is further provided with a cross pin J on which is swiveled the bearing block J 6 having parallel top and bottom faces. M are rods extending through the hollow shanks F and provided at their upper ends with the horizontally slotted heads M embracing the blocks J. These rods serve to transmitto the frame J an oscillatory movement in a vertical plane, while also permitting oscillation of the bifurcated head in a horizontal plane and movements of the frame J inward and outward upon the sliding of the blocks L in the grooves L.

To resist the thrust upon the work in the chuck due to the drilling or tuft-setting operations and also to maintain the work in proper relation to the operating devices, a thrust member is provided. This preferably consists of the frame N which has the parallel side portions N engaging horizontal grooves in the cheek plates in front of the grooves L. The outer ends of the bars N are preferably rounded and engage cam or pattern members 0, which extend in vertical planes on opposite sides of the frame J, and these cams are rigidly secured in position on said frame J and are so fashioned that during the vertical oscillation of said. frame, the point in the brush back in registration with the operating mechanism will always be in a fixed plane. The rear end of the frame N has mounted thereon to extend in a horizontal plane the cam or pattern member 0 engaging a fixed stop P, which cam is so fashioned that during the horizontal oscilla tion of the bifurcated head E, the point in the brush back in registration with the operating devices is always in the same fixed plane. Thus without regard to the order of oscillations, the portion of the work in registration with the drilling or tuft setting mechanism will maintain a fixed relation thereto.

The stop P is preferably in the form of a roller P which is pivoted at the outer end of the screw-threaded shank P This shank engages a standard P on the fixed frame and may be adjusted horizontally inward or outward by means of the threads and clamp-- ing nuts P Between the holders C and D is arranged a vertically extending guideway Q for a pair of slides R and S. The slide S is connected by a pin S to a cross head S which extends beneath the holders C and D and is connected to the vertically extending rods M. Oppositely arranged set screws S serve to adjustably connect this cross head to the pin S. The slide R is connected by a cross-head R to vertically extending'spiral racks R on opposite sides of the guide-way Q. These racks are in mesh with segmental spiral gears T on the hollow shanks F, and the arrangement such that th vertical reciprocation of said racks will impart an oscillatory movement to the gears on the hollow shanks, thereby oscillating the heads E. U is a spring sleeved about a pin U extending from the upper end of the slide B, said spring abutting against a plate V at the'upper end of the guide Q and serving to resiliently press the slide R downward.

The slides R and S are actuated by cam wheels WV and WV, which are mounted upon a common shaft X, the latter being intermittently driven in timed relation to .the drilling and bristle setting mechanism by suitable means (not described), The cams and W are so fashioned as to impart a predetermined reciprocatory movement to the respective slides, which will effect the successive adjustments of the work holders.

In operation, the sequence and the amplitude of the successive adjustments of the Work holders is determined by the cams V] and l V. To facilitate the forming of these cams, a brush back is first laid out with a pattern and is then placed in one of the holders and the latter is adjusted to successively register the points of the pattern with the drill of the drilling mechanism. In each position of adjustment the cam blanks are marked in relation to the slides R and S and eventually the marked blanks are cut to form a cam of the desired contour. This operation of forming a cam is facilitated by threading the rod U which projects upward from the slide R and providing a correspondingly threaded rod Y which is engageable with the upper end of the slide S. These rods U and Y extend through the cap V and by placing adjusting nuts, such as indicated in dotted lines at Y, on each of these rods, they may be readily adjusted until the desired position of the head is obtained. The slides R and S are provided with rollers Z and Z which project laterally therefrom and are engageable with the peripheries of the cams. These rollers are journaled on pins attached to threaded bushings Z which engage correspondingly threaded apertures in the slides and these bushings with the rolls may be removed to permit the substitution therefor of a suitable marking tool, such as a small drill, by means of which the cam blanks may be marked. Thus, after the blanks are fully marked for the complete cycle, they are cut to this the tuft setting shape and any subsequent operation will reproduce the steps of the original moveent- When-the cams are properly fashioned and are mounted upon the shaft, the machine is ready for operation. A brush back is first placed in one of the holders, such as the holder C, and the mechanism started- The drilling and tuft setting mechanisms are operated to be advanced towards and withdrawn from the work in each cycle, and during the interval when they are withdrawn from the work the cams W and WV are actuated. The cam W through the medium of the slide R and connecting parts will move the spiral racks R vertically, which in turn will actuate the spiral gears T and rock the shank F and bifurcated head E connected thereto. At the same time the cam W, through the medium of the slide S and cross head S will impart a vertical movement to the rods M, which, through the slotted heads M engaging the blocks J 6 on the cross pin I, will cause the rocking of the frame J about the pivot pin K. These combined movements will effect an adjustment of the brush back from one point to another so as to be properly positioned for the successive operation of the mechanisms. It will be observed, however, thatthe springs L acting upon the bearings L for the pivot pin K are tending, to move said pin and the frame J pivoted thereon rearward oraway from the drilling and tuft setting mechanisms; also that the frame N, which isf-reely slidable in the grooves L of the cheek plates but which bears at its forward end againstthe patterns 0 and at its rear end against the stop P, limits the rearward movement of In other words, the thrust of the springs L as well as that occasioned by the performance of the work is transmitted through the sliding" frame N to the back stop P, but the shape of the cams O and O is such that each point in the brush back successively operated upon will occupy precisely the same position in relation to the drilling or tuft setting mechanisms. Thus the brush back in the holder will be adjusted from point to point until allof the tuft'receiving holes have been drilled when the machine is brought to a stop. The operator then removes the drilled brush back from its holder, transfers it to the holder for the tuft setting mechanism, and places an unbored blank in the original holder, after which the machine is again started to repeat the cycle.

It has been stated that the deflection of the drill, when engaging a face of the brush back which is disposed at an angle thereto,

will be sufficient to change slightly the position of the drilled hole. On theother hand, mechanism will not be so afiected and therefore will not perfectly stop P, which, when it is drilling or tuft setting said oscillating frame J.

registerwith the deflected hole. This defect I have cured by merely adjusting the back moved forward, will diminish the radial lengths of both the frame J and the head E, and consequently, will change t e amplitude of the successive movements. In this manner the two holders may be relatively adjusted so that the holes drilled in the brush back will exactly register with the tuft setting mechanism.

That I claim as my invention is:

1. In a brush machine, the combination with a reciprocable tool for operating on a brush back, of a frame, a work holder mounted on said frame for oscillating movements about two transverse axes and for sliding movement in the line 'of' reciprocation of said tool, a cam carried by said work holder and adapted to move therewith about one of said transverse axes, said cam being spaced farther from said reciprocable tool than said transverse axes and a back bearing secured to said frame and engaging said movable cam, said back bearing being ar ranged in axial alignment with saidreciprocable tool.

2. In a brush machine, the combination with a reciprocable tool for operating on a brush back, of a frame, a work holder mount ed on said frame for oscillating movements about two transverse axes and for sliding movement in the line of reciprocation of said tool, a cam carried by said work holder and adapted to move therewith about one of said transverse axes, said cam being spaced farther from said reciproca'ble tool than said transverse axes, a back bearing mounted on said frame to engage said "movable cam in axial alignment with said reciprocable tool and means for axially adjusting said back bearlng.

. 3. In a brush machine, the combination with a mechanism for operating upon a brush back, of, a brush back holder mounted for universal movement, said mounting including a member carrying said holder and pivoted for oscillation in one plane, a member carrying said last mentioned member and pivoted for oscillation in a plane transverse to said first mentioned plane, means for imparting to said members movements for successively registering a predetermined series of points in the brush back with said operating mechanism, a thrust member extending parallel to the line of intersection of said transverse planes, a cam on said holder engaging said thrust member, a cam on said thrust member arranged in a trans verse plane tothat on the holder, a normally ries of points in a brush back with a mechanism for operating thereupon, comprising a pivotally mounted head adapted for movement in one plane, a member mounted on said head for pivotal movement in a plane transverse to said first mentioned plane and also being free for sliding movement in a direction transverse to the axes of both pivots, a brush back holder mounted on the last-mentioned member, a thrust member extending in the direction transverseto the axes of said pivots, a cam on said brush back holder for engaging said thrust member, a cam on said thrust member arranged in a plane transverse to that of said brush back holder, a normally fixed bearing ongaging the latter cam, means for pressing said brush back holder in a direction resisted by said thrust member, a pair of rotary cams, means actuated by one of said cams for oscillating said pivotal head, means operated by the other of said cams and passing through the pivot of said head for oscillating about its axis, the member mounted in said head while permitting freedom for movement in the direction of said thrust bearing.

. 5. In a brush machine, a work holder for successively registering a predetermined series of points in a brush back with a mechanism for operating thereupon, comprising a fixed frame, a head pivotally mounted in said frame and provided with parallelly arranged cheek plates, a member arranged between said cheek plates and bearing thereagainst, a pivot for the latter member slidable in said cheek plates in a direction perpendicular to the axes of both pivots, a back-holding chuck mounted on said member between the cheek plates, a thrust frame slidably engaging said cheek plates, cams on the opposite sides of said back chuck for engaging the ends of said thrust frame, a cam on the opposite end of said thrust frame arranged in a plane transverse to the plane of said back-holding chuck, and a bearing on the fixed frame for engaging said cam and receiving the thrust transmitted through said thrust frame.

6. In a brush machine, a work holder for successively registering a predetermined. series of points in a brush back with a mechanism for operating thereupon, comprising a fixed frame, a bifurcated head pivotally mounted on said frame by means of a vertically extending hollow shank journalled on said frame, a member arranged between the furcations of said head, and pivotally and slidingly engaging the furcations of said head to slide therein in a direction transverse to the axis of said hollow shank, a back holding chuck mounted on said member, a bifurcated thrust frame arranged be tweenthe furcations of said head and slidable in a horizontal plane, the forward ends of said thrust member being rounded to form substantial point bearings, cams mounted upon the opposite edges of the rear yieldably pressing said chuck against said thrust member, means engaging the shank of said head for oscillating the same,

a rod extending through said hollow shank and a connection between the upper end of said rod and said chuck holding member for oscillating the latter by a vertical reciprocation of the rod, said connection permitting of the independent movement of said member'against said thrust member.

7. In a brush machine, a work holder for successively registering a predetermined series of. points in a brush back with a mechanism for operating thereupon, comprising a fixed frame, a bifurcated head having a liollow vertically extending shank journaled in said fixed frame, a member arranged be tween the furcations of said head and .extending forward thereof, a back holding chuck secured to the forward end of said member, a pivot at the rear end of said member extending transversely thereof and entering horizontallyextending grooves in said head, bearing blocks for said pivot slidably engaging said grooves, springs bearing against said blocks to yieldably press the same rearward, a thrust frame having opposite side bars slidably engaging horizontal grooves in the furcations of said head, cams secured to said chuck in vertical planes and engaging the forward ends of said thrust vframe, a cam mounted at the rear of said thrust frame in a horizontal plane, a bearing on said fixed frame for engaging said lastmentioned cam, a rod passing through said hollow shank and connectedat its upper end to said chuck holding member'to actuate the same about its pivot while permitting the independent movement in a horizontal plane, means for imparting oscillatory movement to said hollow shank, means engaging said hollow shank for oscillating said head in a horizontal plane, and means for reciprocating the rod passing through said shank for oscillatig the chuck in a vertical plane.

8. In a brush machine, a work holder for successively registering a predetermined series of points in a brush back with a mechanism for operating thereupon, comprising a frame, a pair of parallelly arranged vertical slides engaging bearings in said frame, a pair of rotating cams for engaging said slides to impart a predetermined reciprollU eatery movement thereto, a plurality of bi-' furcated heads, each having a hollow vering member,

cations of each head having a horizontal pivot engaging said furcations, a back-holding chuck at the forward end of said member, a cross head mounted on one of said slides, rods connected to said cross head extending through said hollow shanks and connected at their upper ends to said chuck holding members, spiral gears on said hollow shanks, and racks secured to the other of said slides engaging said spiral gears, whereby the vertical reciprocation of said slides under the actuation of their respective cams will simultaneously impart vertical and horizontal oscillations to said back-holding chuck.

9. In a brush machine, a work holder for successively registering a predetermined 'series of points in a brush back with a mechanism for operating thereupon, frame, a vertical guide-way mounted on said frame, a pair of slides engaging said guide way for vertical reciprocation, rotary cams arranged beneath said slides and respectively engaging the same to impart, a reciprocatory movement, a pair of bifurcated heads each having a hollow shank, said heads being arranged on opposite sides of said guide-way with the shanks journaled in said 7 frame, a member arranged between the furcations of each head and pivotally connected thereto, a back-holding chuck mounted on said member, a rod passing'through each hollow shank and engaging said chuck-holda cross head connected to one of said slides and carrying said. rods, spiral gears on said hollow shanks and racks engaging said spiral gears mounted on the other of said slides, whereby the reciprocation of said slides will impart to said chucks simultaneous and corresponding oscillations in vertical and horizontal planes.

10. In a brush machine, a work holder for successively registering a predetermined series of points in a brush back with a mechanism for operating thereupon, comprising a frame, a vertical guide-way thereon, a pair of slides mounted in said guide-way for vertical reciprocation, a pair of rotary cams for respectively engaging said slides to actuate the same, a pair of bifurcated heads arranged on opposite sides of said slides each head having a hollow vertically extending shank journaled in said frame, spiralgears secured to said shanks, racks mounted on one comprising a of said slides for engaging said spiral gears to impart an oscillatory movement thereto upon a vertical reciprocation of said slide, a cross head secured to the other slide, rods mounted on said cross head passing through said hollow shanks, horizontally slotted heads at the upper end of said rods, a member pivoted between the'furcations of each head, a bearing on said member engaging said slotted heads on said vertical rods, a chuck mounted on said member between the furcations of said head, a thrust member for engaging said chuck, cams arranged respectively in vertical and horizontal planes, one of said cams being on said chuck and coo crating with said thrust member and tffe other of said cams being carried by said thrust member, and a single fixed bearing cooperating with the last mentioned cam for receiving the thrust from said thrust mem-' her, for the purpose described. I

11. In a brush machine, a holder for a brush back mounted to oscillate about two transverse axes, a pair of concentric shafts in alignment with one of said axes, one shaft being rotatable and the other being longitudinally movable, connections between said shafts and said work holder for imparting said oscillatory movements, a pair of rotatable cams, a pair of slides respectively engaging said cams, a connection between one of said slides and said longitudinally movable shaft, a spiral rack on the other slide, and a gear connecting said rack with said rotatable shaft.

12. In a brush machine, a fixed frame, a pair of parallel slides movable in said frame, a pair of rotating camsfor respectively engaging said slides to impart movement to the latter, a shaft journalled in said frame, a head connected to said shaft to rotate therewith, a member'pivoted to said head and adapted to oscillate about an axis transverse to said shaft, means connecting said pivoted member to one of said slides, a rack carried by the other of said slides, a gear engaging said rack, and a connection between said gear and said shaft for transmitting rotative movement ,to the latter upon movement of a said rack-carrymg slide. In testimony whereof I CONRAD JOBST.

aflix my signature. 

